Fire clay is a term applied to a range of refractory clays used in the manufacture of ceramics, especially fire brick. The United States Environmental Protection Agency defines fire clay very generally as a "mineral aggregate composed of hydrous silicates of aluminium (Al2O3.2SiO2.2H2O) with or without free silica."
Read more about Fire Clay: Properties, Chemical Composition, Extraction
Famous quotes containing the words fire and/or clay:
“The LORD went in front of them in a pillar of cloud by day, to lead them along the way, and in a pillar of fire by night, to give them light, so that they might travel by day and by night. Neither the pillar of cloud by day nor the pillar of fire by night left its place in front of the people.”
—Bible: Hebrew, Exodus 13:21,22.
“Was it for this the clay grew tall?
MO what made fatuous sunbeams toil
To break earth’s sleep at all?”
—Wilfred Owen (1893–1918)